Compatibilization Effect of Poly(ε-caprolactone)-b-poly(ethylene glycol) Block Copolymers and Phase Morphology Analysis in Immiscible Poly(lactide)/Poly(ε-caprolactone) Blends
Abstract
The miscibility and phase behavior of two stereoisomer forms of poly(lactide) (PLA: poly (L-lactide) (PLLA) and poly(DL-lactide) (PDLLA)) blends with poly(epsilon-caprolactone)-b-poly(ethylene glycol) (PCL-b-PEG) and PCL-b-monomethoxy-PEG (PCL-b-MPEG) block copolymers have been investigated by differential scanning calorimetry (DSC). The DSC thermal behavior of both the blend systems revealed that PLA is miscible with the PEG segment phase of PCL-b-(M)PEG but is still immiscible with its PCL segment phase although PCL was block-copolymerized with PEG. On the basis of these results, PCL-b-PEG was added as a compatibilizer to PLA/PCL binary blends. The improvement in mechanical properties of PLA/PCL blends was achieved as anticipated upon the addition of PCL-b-PEG. In addition, atomic force microscopy (AFM) measurements have been performed in order to study the compositional synergism to be observed in mechanical tests. AFM observations of the morphological dependency on blend composition indicate that PLA/PCL blends are immiscible but compatible to some extent and that synergism of compatibilizing may be maximized in the compositional blend ratio before apparent phase separation and coarsening.
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PLLA with a high molecular weight is reported to be immiscible with PCL.
“Since PLLA with a high molecular weight is reported to be immiscible with PCL, [17-19] the morphology of PLLA/PCL blends would be coarse and with low adhesion strength, thus desirable mechanical properties are not anticipated.”
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- Authors
- Na, Y.-H., He, Y., Shuai, X., Kikkawa, Y., Doi, Y., & Inoue, Y.
- Affiliations
- Tokyo Institute of Technology (JP)
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-09-20
- Volume
- 3
- Issue
- 6
- Pages
- 1179-1186
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2035308074
- Cited by
- 219
- References
- 27
- Citations by year
- 2025: 3 · 2024: 10 · 2023: 7 · 2022: 8 · 2021: 8 · 2020: 9 · 2019: 8 · 2018: 13 · 2017: 13 · 2016: 13 · 2015: 16 · 2014: 14 · 2013: 8 · 2012: 11
- FWCI
- 2.57
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biomacromolecules (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
- Keywords
- polycaprolactone, poly(L-lactic acid), poly(D,L-lactide), compatibilization, immiscible polymer blends, blend morphology, mechanical properties, phase separation
- MeSH terms
- Calorimetry, Differential Scanning, Crystallization, Ethylene Glycols, Polyesters, Stereoisomerism, Microscopy, Atomic Force
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